diff --git a/OvmfPkg/OvmfPkgIa32.dsc b/OvmfPkg/OvmfPkgIa32.dsc
index d296d932f92e..473ef5e9bb2c 100644
--- a/OvmfPkg/OvmfPkgIa32.dsc
+++ b/OvmfPkg/OvmfPkgIa32.dsc
@@ -37,7 +37,6 @@ [Defines]
   DEFINE NETWORK_IP6_ENABLE      = FALSE
   DEFINE HTTP_BOOT_ENABLE        = FALSE
   DEFINE SMM_REQUIRE             = FALSE
-  DEFINE USE_OLD_PCI_HOST        = FALSE
 
 [BuildOptions]
   GCC:*_UNIXGCC_*_CC_FLAGS             = -DMDEPKG_NDEBUG
@@ -82,9 +81,7 @@ [LibraryClasses]
   DxeServicesTableLib|MdePkg/Library/DxeServicesTableLib/DxeServicesTableLib.inf
   PeCoffGetEntryPointLib|MdePkg/Library/BasePeCoffGetEntryPointLib/BasePeCoffGetEntryPointLib.inf
   PciCf8Lib|MdePkg/Library/BasePciCf8Lib/BasePciCf8Lib.inf
-!if $(USE_OLD_PCI_HOST) == FALSE
   PciExpressLib|MdePkg/Library/BasePciExpressLib/BasePciExpressLib.inf
-!endif
   PciLib|MdePkg/Library/BasePciLibCf8/BasePciLibCf8.inf
   PciSegmentLib|MdePkg/Library/BasePciSegmentLibPci/BasePciSegmentLibPci.inf
   IoLib|MdePkg/Library/BaseIoLibIntrinsic/BaseIoLibIntrinsic.inf
@@ -245,9 +242,7 @@ [LibraryClasses.common.DXE_RUNTIME_DRIVER]
 !if $(SECURE_BOOT_ENABLE) == TRUE
   BaseCryptLib|CryptoPkg/Library/BaseCryptLib/RuntimeCryptLib.inf
 !endif
-!if $(USE_OLD_PCI_HOST) == FALSE
   PciLib|OvmfPkg/Library/DxePciLibI440FxQ35/DxePciLibI440FxQ35.inf
-!endif
 
 [LibraryClasses.common.UEFI_DRIVER]
   PcdLib|MdePkg/Library/DxePcdLib/DxePcdLib.inf
@@ -262,9 +257,7 @@ [LibraryClasses.common.UEFI_DRIVER]
   DebugLib|OvmfPkg/Library/PlatformDebugLibIoPort/PlatformDebugLibIoPort.inf
 !endif
   UefiScsiLib|MdePkg/Library/UefiScsiLib/UefiScsiLib.inf
-!if $(USE_OLD_PCI_HOST) == FALSE
   PciLib|OvmfPkg/Library/DxePciLibI440FxQ35/DxePciLibI440FxQ35.inf
-!endif
 
 [LibraryClasses.common.DXE_DRIVER]
   PcdLib|MdePkg/Library/DxePcdLib/DxePcdLib.inf
@@ -294,9 +287,7 @@ [LibraryClasses.common.DXE_DRIVER]
 !endif
   QemuBootOrderLib|OvmfPkg/Library/QemuBootOrderLib/QemuBootOrderLib.inf
   FileExplorerLib|MdeModulePkg/Library/FileExplorerLib/FileExplorerLib.inf
-!if $(USE_OLD_PCI_HOST) == FALSE
   PciLib|OvmfPkg/Library/DxePciLibI440FxQ35/DxePciLibI440FxQ35.inf
-!endif
 
 [LibraryClasses.common.UEFI_APPLICATION]
   PcdLib|MdePkg/Library/DxePcdLib/DxePcdLib.inf
@@ -308,9 +299,7 @@ [LibraryClasses.common.UEFI_APPLICATION]
 !else
   DebugLib|OvmfPkg/Library/PlatformDebugLibIoPort/PlatformDebugLibIoPort.inf
 !endif
-!if $(USE_OLD_PCI_HOST) == FALSE
   PciLib|OvmfPkg/Library/DxePciLibI440FxQ35/DxePciLibI440FxQ35.inf
-!endif
 
 [LibraryClasses.common.DXE_SMM_DRIVER]
   PcdLib|MdePkg/Library/DxePcdLib/DxePcdLib.inf
@@ -330,9 +319,7 @@ [LibraryClasses.common.DXE_SMM_DRIVER]
   DebugAgentLib|SourceLevelDebugPkg/Library/DebugAgent/SmmDebugAgentLib.inf
 !endif
   BaseCryptLib|CryptoPkg/Library/BaseCryptLib/SmmCryptLib.inf
-!if $(USE_OLD_PCI_HOST) == FALSE
   PciLib|OvmfPkg/Library/DxePciLibI440FxQ35/DxePciLibI440FxQ35.inf
-!endif
 
 [LibraryClasses.common.SMM_CORE]
   PcdLib|MdePkg/Library/DxePcdLib/DxePcdLib.inf
@@ -348,9 +335,7 @@ [LibraryClasses.common.SMM_CORE]
 !else
   DebugLib|OvmfPkg/Library/PlatformDebugLibIoPort/PlatformDebugLibIoPort.inf
 !endif
-!if $(USE_OLD_PCI_HOST) == FALSE
   PciLib|OvmfPkg/Library/DxePciLibI440FxQ35/DxePciLibI440FxQ35.inf
-!endif
 
 ################################################################################
 #
@@ -554,14 +539,10 @@ [Components]
   UefiCpuPkg/CpuIo2Dxe/CpuIo2Dxe.inf
   UefiCpuPkg/CpuDxe/CpuDxe.inf
   PcAtChipsetPkg/8254TimerDxe/8254Timer.inf
-!if $(USE_OLD_PCI_HOST) == TRUE
-  OvmfPkg/PciHostBridgeDxe/PciHostBridgeDxe.inf
-!else
   MdeModulePkg/Bus/Pci/PciHostBridgeDxe/PciHostBridgeDxe.inf {
     <LibraryClasses>
       PciHostBridgeLib|OvmfPkg/Library/PciHostBridgeLib/PciHostBridgeLib.inf
   }
-!endif
   MdeModulePkg/Bus/Pci/PciBusDxe/PciBusDxe.inf {
     <LibraryClasses>
       PcdLib|MdePkg/Library/DxePcdLib/DxePcdLib.inf
diff --git a/OvmfPkg/OvmfPkgIa32X64.dsc b/OvmfPkg/OvmfPkgIa32X64.dsc
index 8489b77e887d..41e8fc139218 100644
--- a/OvmfPkg/OvmfPkgIa32X64.dsc
+++ b/OvmfPkg/OvmfPkgIa32X64.dsc
@@ -37,7 +37,6 @@ [Defines]
   DEFINE NETWORK_IP6_ENABLE      = FALSE
   DEFINE HTTP_BOOT_ENABLE        = FALSE
   DEFINE SMM_REQUIRE             = FALSE
-  DEFINE USE_OLD_PCI_HOST        = FALSE
 
 [BuildOptions]
   GCC:*_UNIXGCC_*_CC_FLAGS             = -DMDEPKG_NDEBUG
@@ -87,9 +86,7 @@ [LibraryClasses]
   DxeServicesTableLib|MdePkg/Library/DxeServicesTableLib/DxeServicesTableLib.inf
   PeCoffGetEntryPointLib|MdePkg/Library/BasePeCoffGetEntryPointLib/BasePeCoffGetEntryPointLib.inf
   PciCf8Lib|MdePkg/Library/BasePciCf8Lib/BasePciCf8Lib.inf
-!if $(USE_OLD_PCI_HOST) == FALSE
   PciExpressLib|MdePkg/Library/BasePciExpressLib/BasePciExpressLib.inf
-!endif
   PciLib|MdePkg/Library/BasePciLibCf8/BasePciLibCf8.inf
   PciSegmentLib|MdePkg/Library/BasePciSegmentLibPci/BasePciSegmentLibPci.inf
   IoLib|MdePkg/Library/BaseIoLibIntrinsic/BaseIoLibIntrinsic.inf
@@ -250,9 +247,7 @@ [LibraryClasses.common.DXE_RUNTIME_DRIVER]
 !if $(SECURE_BOOT_ENABLE) == TRUE
   BaseCryptLib|CryptoPkg/Library/BaseCryptLib/RuntimeCryptLib.inf
 !endif
-!if $(USE_OLD_PCI_HOST) == FALSE
   PciLib|OvmfPkg/Library/DxePciLibI440FxQ35/DxePciLibI440FxQ35.inf
-!endif
 
 [LibraryClasses.common.UEFI_DRIVER]
   PcdLib|MdePkg/Library/DxePcdLib/DxePcdLib.inf
@@ -267,9 +262,7 @@ [LibraryClasses.common.UEFI_DRIVER]
   DebugLib|OvmfPkg/Library/PlatformDebugLibIoPort/PlatformDebugLibIoPort.inf
 !endif
   UefiScsiLib|MdePkg/Library/UefiScsiLib/UefiScsiLib.inf
-!if $(USE_OLD_PCI_HOST) == FALSE
   PciLib|OvmfPkg/Library/DxePciLibI440FxQ35/DxePciLibI440FxQ35.inf
-!endif
 
 [LibraryClasses.common.DXE_DRIVER]
   PcdLib|MdePkg/Library/DxePcdLib/DxePcdLib.inf
@@ -299,9 +292,7 @@ [LibraryClasses.common.DXE_DRIVER]
 !endif
   QemuBootOrderLib|OvmfPkg/Library/QemuBootOrderLib/QemuBootOrderLib.inf
   FileExplorerLib|MdeModulePkg/Library/FileExplorerLib/FileExplorerLib.inf
-!if $(USE_OLD_PCI_HOST) == FALSE
   PciLib|OvmfPkg/Library/DxePciLibI440FxQ35/DxePciLibI440FxQ35.inf
-!endif
 
 [LibraryClasses.common.UEFI_APPLICATION]
   PcdLib|MdePkg/Library/DxePcdLib/DxePcdLib.inf
@@ -313,9 +304,7 @@ [LibraryClasses.common.UEFI_APPLICATION]
 !else
   DebugLib|OvmfPkg/Library/PlatformDebugLibIoPort/PlatformDebugLibIoPort.inf
 !endif
-!if $(USE_OLD_PCI_HOST) == FALSE
   PciLib|OvmfPkg/Library/DxePciLibI440FxQ35/DxePciLibI440FxQ35.inf
-!endif
 
 [LibraryClasses.common.DXE_SMM_DRIVER]
   PcdLib|MdePkg/Library/DxePcdLib/DxePcdLib.inf
@@ -335,9 +324,7 @@ [LibraryClasses.common.DXE_SMM_DRIVER]
   DebugAgentLib|SourceLevelDebugPkg/Library/DebugAgent/SmmDebugAgentLib.inf
 !endif
   BaseCryptLib|CryptoPkg/Library/BaseCryptLib/SmmCryptLib.inf
-!if $(USE_OLD_PCI_HOST) == FALSE
   PciLib|OvmfPkg/Library/DxePciLibI440FxQ35/DxePciLibI440FxQ35.inf
-!endif
 
 [LibraryClasses.common.SMM_CORE]
   PcdLib|MdePkg/Library/DxePcdLib/DxePcdLib.inf
@@ -353,9 +340,7 @@ [LibraryClasses.common.SMM_CORE]
 !else
   DebugLib|OvmfPkg/Library/PlatformDebugLibIoPort/PlatformDebugLibIoPort.inf
 !endif
-!if $(USE_OLD_PCI_HOST) == FALSE
   PciLib|OvmfPkg/Library/DxePciLibI440FxQ35/DxePciLibI440FxQ35.inf
-!endif
 
 ################################################################################
 #
@@ -563,14 +548,10 @@ [Components.X64]
   UefiCpuPkg/CpuIo2Dxe/CpuIo2Dxe.inf
   UefiCpuPkg/CpuDxe/CpuDxe.inf
   PcAtChipsetPkg/8254TimerDxe/8254Timer.inf
-!if $(USE_OLD_PCI_HOST) == TRUE
-  OvmfPkg/PciHostBridgeDxe/PciHostBridgeDxe.inf
-!else
   MdeModulePkg/Bus/Pci/PciHostBridgeDxe/PciHostBridgeDxe.inf {
     <LibraryClasses>
       PciHostBridgeLib|OvmfPkg/Library/PciHostBridgeLib/PciHostBridgeLib.inf
   }
-!endif
   MdeModulePkg/Bus/Pci/PciBusDxe/PciBusDxe.inf {
     <LibraryClasses>
       PcdLib|MdePkg/Library/DxePcdLib/DxePcdLib.inf
diff --git a/OvmfPkg/OvmfPkgX64.dsc b/OvmfPkg/OvmfPkgX64.dsc
index 24fa073542d3..ffdc9e62074f 100644
--- a/OvmfPkg/OvmfPkgX64.dsc
+++ b/OvmfPkg/OvmfPkgX64.dsc
@@ -37,7 +37,6 @@ [Defines]
   DEFINE NETWORK_IP6_ENABLE      = FALSE
   DEFINE HTTP_BOOT_ENABLE        = FALSE
   DEFINE SMM_REQUIRE             = FALSE
-  DEFINE USE_OLD_PCI_HOST        = FALSE
 
 [BuildOptions]
   GCC:*_UNIXGCC_*_CC_FLAGS             = -DMDEPKG_NDEBUG
@@ -87,9 +86,7 @@ [LibraryClasses]
   DxeServicesTableLib|MdePkg/Library/DxeServicesTableLib/DxeServicesTableLib.inf
   PeCoffGetEntryPointLib|MdePkg/Library/BasePeCoffGetEntryPointLib/BasePeCoffGetEntryPointLib.inf
   PciCf8Lib|MdePkg/Library/BasePciCf8Lib/BasePciCf8Lib.inf
-!if $(USE_OLD_PCI_HOST) == FALSE
   PciExpressLib|MdePkg/Library/BasePciExpressLib/BasePciExpressLib.inf
-!endif
   PciLib|MdePkg/Library/BasePciLibCf8/BasePciLibCf8.inf
   PciSegmentLib|MdePkg/Library/BasePciSegmentLibPci/BasePciSegmentLibPci.inf
   IoLib|MdePkg/Library/BaseIoLibIntrinsic/BaseIoLibIntrinsic.inf
@@ -250,9 +247,7 @@ [LibraryClasses.common.DXE_RUNTIME_DRIVER]
 !if $(SECURE_BOOT_ENABLE) == TRUE
   BaseCryptLib|CryptoPkg/Library/BaseCryptLib/RuntimeCryptLib.inf
 !endif
-!if $(USE_OLD_PCI_HOST) == FALSE
   PciLib|OvmfPkg/Library/DxePciLibI440FxQ35/DxePciLibI440FxQ35.inf
-!endif
 
 [LibraryClasses.common.UEFI_DRIVER]
   PcdLib|MdePkg/Library/DxePcdLib/DxePcdLib.inf
@@ -267,9 +262,7 @@ [LibraryClasses.common.UEFI_DRIVER]
   DebugLib|OvmfPkg/Library/PlatformDebugLibIoPort/PlatformDebugLibIoPort.inf
 !endif
   UefiScsiLib|MdePkg/Library/UefiScsiLib/UefiScsiLib.inf
-!if $(USE_OLD_PCI_HOST) == FALSE
   PciLib|OvmfPkg/Library/DxePciLibI440FxQ35/DxePciLibI440FxQ35.inf
-!endif
 
 [LibraryClasses.common.DXE_DRIVER]
   PcdLib|MdePkg/Library/DxePcdLib/DxePcdLib.inf
@@ -299,9 +292,7 @@ [LibraryClasses.common.DXE_DRIVER]
 !endif
   QemuBootOrderLib|OvmfPkg/Library/QemuBootOrderLib/QemuBootOrderLib.inf
   FileExplorerLib|MdeModulePkg/Library/FileExplorerLib/FileExplorerLib.inf
-!if $(USE_OLD_PCI_HOST) == FALSE
   PciLib|OvmfPkg/Library/DxePciLibI440FxQ35/DxePciLibI440FxQ35.inf
-!endif
 
 [LibraryClasses.common.UEFI_APPLICATION]
   PcdLib|MdePkg/Library/DxePcdLib/DxePcdLib.inf
@@ -313,9 +304,7 @@ [LibraryClasses.common.UEFI_APPLICATION]
 !else
   DebugLib|OvmfPkg/Library/PlatformDebugLibIoPort/PlatformDebugLibIoPort.inf
 !endif
-!if $(USE_OLD_PCI_HOST) == FALSE
   PciLib|OvmfPkg/Library/DxePciLibI440FxQ35/DxePciLibI440FxQ35.inf
-!endif
 
 [LibraryClasses.common.DXE_SMM_DRIVER]
   PcdLib|MdePkg/Library/DxePcdLib/DxePcdLib.inf
@@ -335,9 +324,7 @@ [LibraryClasses.common.DXE_SMM_DRIVER]
   DebugAgentLib|SourceLevelDebugPkg/Library/DebugAgent/SmmDebugAgentLib.inf
 !endif
   BaseCryptLib|CryptoPkg/Library/BaseCryptLib/SmmCryptLib.inf
-!if $(USE_OLD_PCI_HOST) == FALSE
   PciLib|OvmfPkg/Library/DxePciLibI440FxQ35/DxePciLibI440FxQ35.inf
-!endif
 
 [LibraryClasses.common.SMM_CORE]
   PcdLib|MdePkg/Library/DxePcdLib/DxePcdLib.inf
@@ -353,9 +340,7 @@ [LibraryClasses.common.SMM_CORE]
 !else
   DebugLib|OvmfPkg/Library/PlatformDebugLibIoPort/PlatformDebugLibIoPort.inf
 !endif
-!if $(USE_OLD_PCI_HOST) == FALSE
   PciLib|OvmfPkg/Library/DxePciLibI440FxQ35/DxePciLibI440FxQ35.inf
-!endif
 
 ################################################################################
 #
@@ -561,14 +546,10 @@ [Components]
   UefiCpuPkg/CpuIo2Dxe/CpuIo2Dxe.inf
   UefiCpuPkg/CpuDxe/CpuDxe.inf
   PcAtChipsetPkg/8254TimerDxe/8254Timer.inf
-!if $(USE_OLD_PCI_HOST) == TRUE
-  OvmfPkg/PciHostBridgeDxe/PciHostBridgeDxe.inf
-!else
   MdeModulePkg/Bus/Pci/PciHostBridgeDxe/PciHostBridgeDxe.inf {
     <LibraryClasses>
       PciHostBridgeLib|OvmfPkg/Library/PciHostBridgeLib/PciHostBridgeLib.inf
   }
-!endif
   MdeModulePkg/Bus/Pci/PciBusDxe/PciBusDxe.inf {
     <LibraryClasses>
       PcdLib|MdePkg/Library/DxePcdLib/DxePcdLib.inf
diff --git a/OvmfPkg/OvmfPkgIa32.fdf b/OvmfPkg/OvmfPkgIa32.fdf
index 40a8976869f6..75338963b6ff 100644
--- a/OvmfPkg/OvmfPkgIa32.fdf
+++ b/OvmfPkg/OvmfPkgIa32.fdf
@@ -207,11 +207,7 @@ [FV.DXEFV]
 INF  UefiCpuPkg/CpuIo2Dxe/CpuIo2Dxe.inf
 INF  UefiCpuPkg/CpuDxe/CpuDxe.inf
 INF  PcAtChipsetPkg/8254TimerDxe/8254Timer.inf
-!if $(USE_OLD_PCI_HOST) == TRUE
-INF  OvmfPkg/PciHostBridgeDxe/PciHostBridgeDxe.inf
-!else
 INF  MdeModulePkg/Bus/Pci/PciHostBridgeDxe/PciHostBridgeDxe.inf
-!endif
 INF  MdeModulePkg/Bus/Pci/PciBusDxe/PciBusDxe.inf
 INF  PcAtChipsetPkg/KbcResetDxe/Reset.inf
 INF  MdeModulePkg/Universal/Metronome/Metronome.inf
diff --git a/OvmfPkg/OvmfPkgIa32X64.fdf b/OvmfPkg/OvmfPkgIa32X64.fdf
index 8e98dfcd7f3d..76eedf8ae195 100644
--- a/OvmfPkg/OvmfPkgIa32X64.fdf
+++ b/OvmfPkg/OvmfPkgIa32X64.fdf
@@ -207,11 +207,7 @@ [FV.DXEFV]
 INF  UefiCpuPkg/CpuIo2Dxe/CpuIo2Dxe.inf
 INF  UefiCpuPkg/CpuDxe/CpuDxe.inf
 INF  PcAtChipsetPkg/8254TimerDxe/8254Timer.inf
-!if $(USE_OLD_PCI_HOST) == TRUE
-INF  OvmfPkg/PciHostBridgeDxe/PciHostBridgeDxe.inf
-!else
 INF  MdeModulePkg/Bus/Pci/PciHostBridgeDxe/PciHostBridgeDxe.inf
-!endif
 INF  MdeModulePkg/Bus/Pci/PciBusDxe/PciBusDxe.inf
 INF  PcAtChipsetPkg/KbcResetDxe/Reset.inf
 INF  MdeModulePkg/Universal/Metronome/Metronome.inf
diff --git a/OvmfPkg/OvmfPkgX64.fdf b/OvmfPkg/OvmfPkgX64.fdf
index 918004d68c44..c5c2754d6fc8 100644
--- a/OvmfPkg/OvmfPkgX64.fdf
+++ b/OvmfPkg/OvmfPkgX64.fdf
@@ -207,11 +207,7 @@ [FV.DXEFV]
 INF  UefiCpuPkg/CpuIo2Dxe/CpuIo2Dxe.inf
 INF  UefiCpuPkg/CpuDxe/CpuDxe.inf
 INF  PcAtChipsetPkg/8254TimerDxe/8254Timer.inf
-!if $(USE_OLD_PCI_HOST) == TRUE
-INF  OvmfPkg/PciHostBridgeDxe/PciHostBridgeDxe.inf
-!else
 INF  MdeModulePkg/Bus/Pci/PciHostBridgeDxe/PciHostBridgeDxe.inf
-!endif
 INF  MdeModulePkg/Bus/Pci/PciBusDxe/PciBusDxe.inf
 INF  PcAtChipsetPkg/KbcResetDxe/Reset.inf
 INF  MdeModulePkg/Universal/Metronome/Metronome.inf
